CN212205153U

CN212205153U - High-frost-resistance evaporator for freezer

Info

Publication number: CN212205153U
Application number: CN202020986558.2U
Authority: CN
Inventors: 李兵强; 刘姗姗; 游庆文
Original assignee: Jiangsu Xingxing Home Appliance Technology Co Ltd
Current assignee: Jiangsu Xingxing Refrigeration Technology Co Ltd
Priority date: 2020-06-03
Filing date: 2020-06-03
Publication date: 2020-12-22
Anticipated expiration: 2030-06-03

Abstract

The utility model discloses a high anti-frosting evaporator for a freezer, which comprises a dust removal device, a defogging device and a cooling device which are arranged in sequence along the air flow conveying direction; evaporation tubes arranged in rows are arranged between the fixed plates and are connected through a transfer bent pipe; a heating pipe is arranged between the fixed plates below the evaporation pipe; the evaporating pipe is provided with a radiating fin; the fixing plate is provided with an insertion hole, and a temperature detector is inserted in the insertion hole; the probe of the temperature detector is positioned between the pipelines of the evaporation tubes; along the air flow conveying direction, the demisting shell is internally provided with demisting plates which are arranged in a wavy manner, and a water outlet is arranged between the demisting plates at the wave trough; a cyclone channel is arranged in the dust removing shell, and the side wall and the top wall of the cyclone channel are respectively provided with an air inlet channel and an air outlet channel; the scheme has the advantages of low energy consumption, high defrosting speed and high defrosting resistance, and solves the problems of low heat utilization rate of the heating pipe, poor defrosting resistance of the evaporator and early defrosting stop and frost blockage easily during defrosting.

Description

High-frost-resistance evaporator for freezer

Technical Field

The utility model relates to a refrigeration plant field specifically is a high anti-frosting evaporator for freezer chest.

Background

The evaporator is used for heat exchange, the interior of the refrigerator is cooled by absorbing heat in air, and the evaporator plays a vital role in the refrigerator, but due to the heat exchange, moisture in the air is easy to condense into frost on the surface of the evaporator, the evaporator of the current refrigerator sold in the market mostly adopts a copper pipe radiating fin evaporator, so that the problems of thin pipe body and narrow plate distance exist, when summer comes, the shopping frequency of customers is increased, the humidity in the refrigerator is increased, the evaporator cannot have enough anti-frosting capacity, the surface of the evaporator is frosted and frozen quickly, and the refrigerator cannot work normally; when the existing evaporator is used for defrosting, a defrosting heating pipe is respectively arranged above and below the evaporator, but according to the principle that hot air rises, most of heat of the upper defrosting heating pipe does not play a role in defrosting, but the temperature of air in a cabinet rises, so that the utilization rate of heating is low; in addition, the probe position of defrosting of current evaporimeter is located copper pipe elbow position, because of the position is comparatively difficult for fixing, the not good condition of probe contact appears easily, this position is influenced by external environment temperature greatly simultaneously, the heating pipe during operation, when defrosting probe detection reaches the settlement temperature, frost on the evaporimeter actually freezes and does not melt totally, the phenomenon is stopped early to the frost of appearing changing, under a plurality of cycle accumulation circumstances, the evaporimeter will take place the frost stifled, lead to the unable normal work of freezer.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides a high anti-frosting evaporator for freezer cabinet has solved the heating pipe heat utilization efficiency low, the evaporator anti-frosting ability poor and appear easily when defrosting that the frost early stops and the stifled problem of frost.

In order to achieve the above object, the utility model provides a following technical scheme: a high anti-frosting evaporator for a freezer cabinet comprises a dust removal device, a defogging device and a cooling device which are sequentially arranged along the air flow conveying direction, wherein air flow passes through the dust removal device to remove most of dust in air and then is sent into the defogging device, and the defogging device removes partial vapor in the air and then flows into the cooling device to be subjected to heat exchange cooling; the cooling device comprises a fixed frame and fixed plates arranged on the left side surface and the right side surface of the fixed frame, and evaporation tubes penetrating through the fixed plates are arranged between the fixed plates at intervals; the evaporation tubes are arranged in rows in a staggered manner; a heating pipe is arranged between the fixed plates below the bottommost evaporation tube; the evaporation tubes are connected through the switching elbow, and a refrigerant flows through a passage formed by the evaporation tubes and the switching elbow; the evaporating pipes are provided with radiating fins which are vertically arranged at intervals; the fixed plate is also provided with an insertion hole, and a temperature detector is movably inserted in the insertion hole; the temperature detector is inserted into the fixed frame along the arrangement direction of the evaporating pipes, and the probe of the temperature detector is positioned between the evaporating pipes; the defogging device comprises a defogging shell with a through front surface and a through back surface, and the back side surface of the defogging shell is arranged on the front side surface of the fixed frame; a defogging plate is arranged in the defogging shell at intervals; the demisting plates are arranged in a wave shape along the air flow conveying direction, and water outlets are formed among the demisting plates at the wave troughs; a slope surface is arranged on the bottom plate of the demisting shell; the dust removal device comprises a dust removal shell, a conical cyclone channel with a narrow lower part and a wide upper part is arranged in the dust removal shell, an air inlet channel is arranged at the upper end of the side wall of the cyclone channel, an air outlet channel is arranged at the top of the cyclone channel, and the air inlet channel and the air outlet channel are both connected with the inner space and the outer space of the dust removal shell in a penetrating manner; the air outlet end of the air outlet channel is connected with the front side surface of the demisting shell, and a demisting filter screen is arranged between the air outlet channel and the demisting shell.

The switching return bend is installed in the lateral surface of fixed plate.

The depth of the temperature detector inserted into the fixed frame is 100 mm.

The distance between the radiating fins is 8 mm; the heat radiating fin is made of aluminum materials.

The diameter of the evaporation tube is 12.7 mm; the inside screw thread and evaporating pipe are copper pipe that are equipped with of evaporating pipe.

The defogging plate is made of metal.

The direction of the heating pipe is consistent with that of the evaporating pipe.

The pipelines of the heating pipes are arranged in a circuitous way, and the heating power of the heating pipes is 900 watts.

The utility model provides a high anti-frosting evaporator for freezer cabinet possesses following beneficial effect:

(1) according to the technical scheme, the temperature detector and the inserting hole are arranged, the probe of the temperature detector is inserted between the pipelines of the evaporating pipe through the inserting hole, the inserting depth of the probe is 100 mm, and the probe can well sense the temperature of the radiating fins and the evaporating copper pipe in the evaporator; when the heating pipe defrosts, because the probe position of the temperature detector is between the evaporating pipes on the middle and upper layers, when the temperature of the probe reaches the set temperature, the temperature of each corner in the evaporator is above the set temperature, and all frost and ice are ensured to be formed into water to drip, thereby greatly improving the high anti-frosting capability of the refrigerator integrally.

(2) This technical scheme has set up the heating pipe, is equipped with the heating pipe of circuitous arranging below the evaporating pipe, has changed the mode that current heating pipe placed when evaporimeter top and below are placed, and steam rises when having solved the heating, and the heating pipe heat utilization efficiency of evaporimeter top is low and bring the problem that the inside temperature of freezer risees easily. Furthermore, the power of the heating pipe is changed into 200 watts, the total energy consumption is lower than that of a heating pipe with 500 watts which is arranged above and below a commercial evaporator, and meanwhile, the high-power heating pipe is arranged at the bottom, and the utilization efficiency of heating of the heating pipe is greatly increased and the defrosting time is shortened by utilizing the principle of hot gas rising and conduction.

(3) The technical scheme is that the evaporation tube is arranged, an internal thread copper tube with the diameter of 12.7 mm is adopted as a coil of the evaporation tube, the internal thread design enables the interior of the tube to easily generate vortex, the phase change prolongs the flowing length of a refrigerant, the heat exchange time is prolonged, and the heat exchange in unit volume is more efficient; meanwhile, the radiating fins of the evaporating pipe are aluminum radiating fins with the radiating fin distance of 8 mm, so that the radiating fin distance is increased, the ventilation air speed between the radiating fins is improved, the frosting risk of the radiating fins is reduced, and the frosting resistance of the evaporator is improved.

(4) According to the technical scheme, the demisting device is arranged, and the airflow flows through the demisting device to remove part of water vapor and then flows into the evaporator for heat exchange cooling, so that the probability of condensation and frosting of the gas at the evaporation tube is reduced, and the anti-frosting capacity of the evaporator is improved; the demisting plates are arranged in a wavy manner along the air flow conveying direction, and the route length of the air flow in the demisting device is prolonged in a phase-changing manner, so that hot air flow in unit volume can fully contact with the cold metal demisting plates, the probability of water vapor condensation is improved, and the probability of frosting of the evaporation tube and the radiating fin is reduced; in addition, all seted up the delivery port between the defogging board of trough department, be favorable to the comdenstion water to collect and drip on the slope of bottom plate, flow along the slope at last.

(5) This technical scheme has set up dust collector, cyclone channel and defogging filter screen, the gaseous cyclone channel that flows into the type of falling the cone that contains the dust, form rotatory decurrent outer whirl air current, the dust that suspends in outer whirl is followed outer whirl and is rotated the cyclone channel bottom under the effect of centrifugal force, gaseous ascending interior whirl of formation of after-purifying is discharged through air outlet channel, and the defogging filter screen that is located air outlet channel exit end intercepts remaining dust once more, have the probability that reduces defogging device and heat sink and congeal the ash, not only avoided among the defogging device too much to block up the delivery port because of the dust overstock and cause the problem that the drainage is not smooth and defogging efficiency reduces, also avoided the heat sink to reduce the problem that influences cooling efficiency because of the dust overstock leads to heat conduction efficiency.

Drawings

Fig. 1 is a schematic view of the structure of the cooling device of the present invention.

Fig. 2 is the overall structure schematic diagram of the cooling device without the cooling fin of the present invention.

Fig. 3 is the overall structure schematic diagram of the defogging device of the present invention.

Fig. 4 is a schematic view of the installation position of the water outlet of the utility model.

Fig. 5 is the semi-sectional schematic view of the dust removing device of the utility model.

Fig. 6 is the schematic view of the structure of the defogging filter screen of the present invention.

In the figure: 101. a fixed frame; 102. an evaporation tube; 103. heating a tube; 104. an insertion hole; 105. a fixing plate; 106. switching a bent pipe; 107. a heat sink; 108. a temperature detector; 201. a defogging shell; 202. a defogging plate; 203. a water outlet; 204. a slope surface; 301. a dust removal housing; 302. a cyclone passage; 303. an air intake passage; 304. an air outlet channel; 305. defogging filter screen.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-6, in order to achieve the above purpose, the present invention provides the following technical solutions:

a high anti-frosting evaporator for a freezer cabinet comprises a dust removal device, a defogging device and a cooling device which are sequentially arranged along the air flow conveying direction, wherein air flow passes through the dust removal device to remove most of dust in air and then is sent into the defogging device, and the defogging device removes partial vapor in the air and then flows into the cooling device to be subjected to heat exchange cooling; the cooling device comprises a fixed frame 101 and fixed plates 105 arranged on the left side surface and the right side surface of the fixed frame 101, and evaporation tubes 102 penetrating through the fixed plates 105 are arranged between the fixed plates at intervals; the evaporation tubes 102 are arranged in rows and staggered; a heating pipe 103 is arranged below the bottommost evaporation pipe 102 and between the fixed plates; the evaporation tubes 102 are connected through a switching elbow 106, and a refrigerant flows through a passage formed by the evaporation tubes 102 and the switching elbow 106; the evaporating pipes 102 are provided with vertically arranged radiating fins 107 at intervals; the fixing plate 105 is further provided with an insertion hole 104, and a temperature detector 108 is movably inserted into the insertion hole 104; the temperature detector 108 is inserted into the fixed frame 101 along the arrangement direction of the evaporation tubes 102, and the probes of the temperature detector 108 are positioned between the evaporation tubes 102; the defogging device comprises a defogging shell 201 with a through front surface and a through back surface, wherein the back side surface of the defogging shell 201 is arranged on the front side surface of the fixed frame 101; a defogging plate 202 is arranged in the defogging shell 201 at intervals; the demisting plates 202 are arranged in a wave shape along the air flow conveying direction, water outlets 203 are formed among the demisting plates 202 at the wave troughs, and water vapor at the wave troughs slides down along the demisting plates 202 after being condensed and flows out from the water outlets 203; a slope surface 204 is arranged on the bottom plate of the demisting shell 201, and condensed water in the demisting shell 201 drips on the bottom plate and then flows out along the slope surface 204, so that the collection and treatment of condensed water are facilitated; the dust removal device comprises a dust removal shell 301, a conical cyclone channel 302 with a narrow lower part and a wide upper part is arranged in the dust removal shell 301, an air inlet channel 303 is arranged at the upper end of the side wall of the cyclone channel 302, an air outlet channel 304 is arranged at the top of the cyclone channel 302, and the air inlet channel 303 and the air outlet channel 304 are both connected with the inner space and the outer space of the dust removal shell 301 in a penetrating manner; the air outlet end of the air outlet channel 304 is connected with the front side surface of the defogging shell 201, and a defogging filter screen 305 is further arranged between the air outlet channel 304 and the defogging shell 201.

The switching elbow 106 is arranged on the outer side surface of the fixing plate 105; the temperature detector 108 is inserted into the fixed frame 101 to a depth of 100 mm; the distance between the radiating fins 107 is 8 mm; the heat sink 107 is made of aluminum material; the diameter of the evaporation tube 102 is 12.7 mm; the inside of the evaporation tube 102 is provided with threads, and the evaporation tube 102 is a copper tube; the defogging plate 202 is made of metal; the direction of the heating pipe 103 is consistent with that of the evaporating pipe 102; the pipelines of the heating pipes 103 are arranged in a winding manner, and the heating power of the heating pipes 103 is 900 watts.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a high anti-frosting evaporator for freezer which characterized in that: the air flow passes through the dust removal device to remove most of dust in the air and then is sent into the demisting device, and after part of vapor in the air is removed in the demisting device, the air flow flows into the cooling device to carry out heat exchange cooling; the cooling device comprises a fixed frame (101) and fixed plates (105) arranged on the left side surface and the right side surface of the fixed frame (101), and evaporation tubes (102) penetrating through the fixed plates (105) are arranged between the fixed plates at intervals; the evaporation tubes (102) are arranged in rows in a staggered manner; a heating pipe (103) is arranged between the fixed plates below the bottommost evaporation pipe (102); the evaporation tubes (102) are connected through a switching elbow (106), and refrigerant flows through a passage formed by the evaporation tubes (102) and the switching elbow (106); the evaporation tubes (102) are provided with radiating fins (107) which are vertically arranged at intervals; the fixing plate (105) is also provided with an insertion hole (104), and a temperature detector (108) is movably inserted in the insertion hole (104); the temperature detector (108) is inserted into the fixed frame (101) along the arrangement direction of the evaporation tubes (102), and probes of the temperature detector (108) are positioned between the evaporation tubes (102); the defogging device comprises a defogging shell (201) with a through front surface and a through back surface, wherein the back side surface of the defogging shell (201) is arranged on the front side surface of the fixed frame (101); a defogging plate (202) is arranged in the defogging shell (201) at intervals; the demisting plates (202) are arranged in a wave shape along the air flow conveying direction, and water outlets (203) are formed among the demisting plates (202) at the wave troughs; a slope surface (204) is arranged on the bottom plate of the demisting shell (201); the dust removal device comprises a dust removal shell (301), a conical cyclone channel (302) which is narrow at the bottom and wide at the top is arranged in the dust removal shell (301), an air inlet channel (303) is arranged at the upper end of the side wall of the cyclone channel (302), an air outlet channel (304) is arranged at the top of the cyclone channel (302), and the air inlet channel (303) and the air outlet channel (304) are both connected with the inner space and the outer space of the dust removal shell (301) in a penetrating manner; an air outlet end of the air outlet channel (304) is connected with the front side surface of the demisting shell (201), and a demisting filter screen (305) is arranged between the air outlet channel (304) and the demisting shell (201).

2. The evaporator for a freezer as claimed in claim 1, wherein: the switching elbow (106) is arranged on the outer side surface of the fixing plate (105).

3. The evaporator for a freezer as claimed in claim 1, wherein: the depth of the temperature detector (108) inserted into the fixed frame (101) is 100 mm.

4. The evaporator for a freezer as claimed in claim 1, wherein: the distance between the radiating fins (107) is 8 mm; the heat sink (107) is made of aluminum material.

5. The evaporator for a freezer as claimed in claim 1, wherein: the diameter of the evaporation tube (102) is 12.7 mm; the inside of the evaporation tube (102) is provided with threads, and the evaporation tube (102) is a copper tube.

6. The evaporator for a freezer as claimed in claim 1, wherein: the defogging plate (202) is made of metal.

7. The evaporator for a freezer as claimed in claim 1, wherein: the direction of the heating pipe (103) is consistent with that of the evaporation pipe (102).

8. The evaporator for a freezer as claimed in claim 1, wherein: the pipelines of the heating pipes (103) are arranged in a winding way, and the heating power of the heating pipes (103) is 900 watts.